[sdiy] Single chip (3 opamp) wave multiplier

[René Schmitz]

I've wondered for quite some time if PM would be possible with a sin(x)
function network, like the AD639. (I.e. adding two waveforms prior to
applying the sin function)
Now this circuit fits perfectly into what I need for that. Great!

Bye,
 René


At 16:51 06.02.01 +0100, Martin Czech wrote:
>It sounds and looks almost like 2 OP , fixed,zero bias carrier "FM",
>which we all know now is PM. A fixed zero bias carrier is nothing
>more then a table, the periodicy makes the wrap arround.
>Real osc shots and comparison with PM waves are to be found
>on my homepage.
>
>m.c.
>
>
>
>:::X-Authentication-Warning: node12b53.a2000.nl: majordomo set sender to 
>owner-synth-diy at node12b53.a2000.nl using -f
>:::From: "Ian Fritz" <ijfritz at earthlink.net>
>:::To: <synth-diy at node12b53.a2000.nl>
>:::Subject: Re: [sdiy] Single chip (3 opamp) wave multiplier
>:::Date: Tue, 6 Feb 2001 08:18:41 -0700
>:::Content-Transfer-Encoding: 7bit
>:::
>:::Hi Juergen --
>:::
>:::Nice work! Thanks for putting it up.
>:::
>:::A couple of thoughts. (1) I'm curious as to why it would sound like FM.
>:::Isn't the output waveform periodic at the input frequency? (2) Have you
>:::experimented at all with feedback?
>:::
>:::  Ian
>:::
>:::
>:::----- Original Message -----
>:::From: "jh." <jhaible at t-online.de>
>:::To: <motm at yahoogroups.com>; "diy" <synth-diy at node12b53.a2000.nl>
>:::Sent: Monday, February 05, 2001 2:48 PM
>:::Subject: [sdiy] Single chip (3 opamp) wave multiplier
>:::
>:::
>:::> Hi,
>:::>
>:::> I have done some work on wave shapers recently.
>:::> Take a look if you're interested:
>:::> http://home.debitel.net/user/jhaible/jh_wavefolder.html
>:::>
>:::> JH.
>:::>
>:::>
>:::>
>
>
-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159